Hoisting apparatus.



J. H. RIGG.

HOISTING APPARATUS.

APPLICATION FILED OCT- 6, 1911.

Patented Aug. 20, 1918.

2 SHEETS-SHEET 1.

EFEQE.

JOSEPH HAROLD RIGG, 0F GOLDENGAIE, ILLINOIS.

HOISTING APPARATUS.

Application filed October 6, 1917.

To all whom it may concern:

Be it known that I, Josnrrr H. Rico, a citizen of the United States, residing at Golden gate, in the county of lVayne and State of Illinois, have invented certain new and useful Improvements in Hois ing Apparatus, of which the following is a specification.

The present invention relates to hoisting apparatus, more particularly to that of the block and tackle type.

An object of this invention is to provide a compact and simply constructed block and tackle for effectively reducing the leverage of, and distributing the strain upon the parts and insuring an equal pull on all portions of the tackle for conveniently hoisting a load without undue strain, and by the 6X- penditure of a minimum amount of power; and to provide a novel means for normally locking the block and tackle when adjusted to maintain a load elevated. and which may be readily released by hand.

The above and various other objects and advantages of this invention will be in part described and in part understood from the following detailed description of the present preferred embodiment, the same being illustrated in the accompanying drawings, wherein Figure 1 is a longitudinal sectional view of a hoisting apparatus constructed according to the present invention.

Fig. 2 is a vertical sectional view of one of the casings used in this invention illus trating the use of the same.

Fig. 3 is a front elevational view of one of the pulley casings.

Fig. 4 is an end elevational view of the same.

Fig. 5 is a side elevational view of one of the pulleys used in the present invention.

Fig. 6 is a detail enlarged fragmentary perspective view showing to advantage the keeper employed.

Fig. 7 is a perspective view of the casing attaching means.

A pair of casings are provided which are of substantially identical contour and conse quently only one will be described in detail.

A casing 10 is provided which has the outer face thereof channeled to provide a pair of grooves 11 and 12, the latter being relatively larger than the former. A recess 13 is formed concentrically in the casing below the plane of the grooves 11 and 12. The recess 13 has a pair of openings 14 communi- Specification of Letters Patent. Patented Aug. 2 9, 1918.

Serial No. 195,105.

eating therewith, the openings extending through one terminal of the block. Ways 15 communicate with the grooves 11 and 12 and also openthrough one terminal of the casing as illustrated to advantage in'Fig. 3.

A pulley wheel 16 is mounted in the casing 10 and comprises three sections 17, 18, and 19 varying in diameter to correspond with the recess 13 and grooves 11 and 12 of the casing 10. The sections have their peripheries grooved adapted for the reception of a cable 20. An opening is formed centrally through pulley 16 and receives a shaft 21, the latter extending into a recess formed in the casing 10 centrally of the recess 13. When the pulley 16 is locked in the casing 10. the outer face of the pulley will be flush with the outer face of the casing as shown to advantage in Fig. 2. To prevent accidental displacement of the pulley from the casing a closure 22 is provided comprising a plate detachably mounted on the front of the casing and having an opening formed therein to receive the outer end of the shaft 21.

In order to prevent slackening of the tackle 20 when the free end thereof is released, a keeper 23 is mounted in the casing 10, the inner end thereof being beveled as indicated at 24 to bind against the tackle. A. nose 25 extends laterally from the keeper and is engaged by a fiat spring 26 which normally forces the beveled end of the keeper into engagement with the cable. It will be noted that the keeper 23 has its free end extended appreciably beyond the periphery of the casing to provide an accessible end by which the keeper may be disengaged from the cable when desired. A re taining loop 27 is mounted on the periphery of the casing and is adapted to engage the free end of the keeper when it is desired to hold the latter out of engagement with the cable.

In use of the device it will be noted that one end of the cable is engaged with one of the casings and has the opposite end passed through one of the openings 14 in the opposite casing, then trained about the grooved periphery of the section 17 pursuant to which the cable is threaded through one of the openings 14 in the opposite casing, then trained about the rooved periphery of the section 17 in the latter. The cable is then trained about the other sections of the pulley wheel and through the other openings 14 and ways 15 in the same man- It is, of course, understood that various (hang and modifications may he made in the details of construction of the above epeciticallfi described embodiment of this invention such changes ,1 nd modifications lieing restricted onl by the scope of the following claims I claim.

1. ln hoisting apparatusythe combination of a two-part using. a shaft supported hetuieen the parts: of the casing, a pulley mounted on the shaft and having stepped grooved portions, and a tackle trained over the said stepped-1 'tions of the pulley in the-grooves and extending through one end of the casing-one part of the casing lnivirgstepped concentric groores in its inner side adapted to closely receive said stepped pullcv and 'niaintain the tackle thereon partici'ilarly vvhen slachened.

Sonic; 0 thisnetent may be obtained for engaging said nose Z01 normally urging the keeper to turn in a direction to bind the heveled end it lQZ'QO'f against tie tackle, a retaining device arranged and etiteriorly upon .1" for engagement with the arm to hold it .7 easing position and against the teneion ot tee spring.

3. A hoisting apparatus including casings cachet which channeled to provide grooves varying in diameter and accessible through one terminal of the casing, a pulley Wheel mounted in each casing, conforming to-the contour oi the latter and having its onto face lush with the outer taco of t 1e casing, a closure mounted on each casing and engaging the pulley XYllGQl to prevent displacement of the latter, said Wheel being equipped ivith a tacltle Which the cas eatends through the accessible end of the casing.

JOSEPH HAEGLD RI addressing the ficmmlssioecr oi Patents, 

